Patent MX-2010014449-A (MX)
Title: Pre-applied waterless adhesive on hvac facings with sealable flange.
Inventor: PARKS JERRY
IPC: F16L59/14
Filed: 2009-07-01
Abstract: A fibrous insulation product (10) having at least one facing material (12) adhered thereto is provided. The facing includes a pre-applied waterless, thin-film adhesive (7), (125) that is thermoplastic and heat activated. Accordingly, the facing may be repaired or repositioned in the field with the use of a hot applicator. In at least one embodiment, the fibrous insulation (10) product is a duct board (147) formed of an insulation layer (14) with a vapor barrier (130) adhered to a first major surface and a fibrous web (5), (132) adhered to a second major surface. The vapor barrier is preferably wider than the insulation layer (14) to form a sealing flange (134). The waterless, thin-film adhesive may be placed on a sealing flange (134) and heat sealed without the use of hand applied foil tape. The waterless, thin-film adhesive reduces odor potential and improves fiberglass recovery. In addition, the waterless, thin-film adhesive requires less energy to cure than a water-based adhesive, thereby reducing cost. A fibrous insulation product (10) having at least one facing material (12) adhered thereto is provided. The facing includes a pre-applied waterless, thin-film adhesive (7), (125) that is thermoplastic and heat activated. Accordingly, the facing may be repaired or repositioned in the field with the use of a hot applicator. In at least one embodiment, the fibrous insulation (10) product is a duct board (147) formed of an insulation layer (14) with a vapor barrier (130) adhered to a first major surface and a fibrous web (5), (132) adhered to a second major surface. The vapor barrier is preferably wider than the insulation layer (14) to form a sealing flange (134). The waterless, thin-film adhesive may be placed on a sealing flange (134) and heat sealed without the use of hand applied foil tape. The waterless, thin-film adhesive reduces odor potential and improves fiberglass recovery. In addition, the waterless, thin-film adhesive requires less energy to cure than a water-based adhesive, thereby reducing cost. An energy recovery heat exchanger (100) includes a housing (102). The housing has a first flowpath (144) from a first inlet (104) to a first outlet (106). The housing has a second flowpath (146) from a second inlet (108) to a second outlet (110). Either of two cores may be in an operative position in the housing. Each core has a number of first passageways having open first and second ends and closed first and second sides. Each core has a number of second such passageways interspersed with the first passageways. The ends of the second passageways are aligned with the sides of the first passageways and vice versa. A number of heat transfer member sections separate adjacent ones of the first and second passageways. An actuator is coupled to the carrier to shift the cores between first and second conditions. In the first condition, the first core (20) is in the operative position and the second core (220) is not. In the second condition, the second core is in the operative position and the first core is not. When a core is in the operative position, its first passageways are along the first flowpath and the second passageways are along the second flowpath.